Steam-boiler



(No Model.)

P. FITZGIBBONS sim-:Amrl BOILBR.

No. 214,301. Patented Mar. z 0, 188s.

UNITED STATES PATENT OEricE;

PATRICK FITZGIBBONS, OF OSWEGO, NEIV YORK.

STEAM-BOI LER.

I SPECIFICATION forming part of Letters Patent No. 274,301, dated March 20, 1883.'

Application filed January 16, 18873. (No model.)

To all whom it may concern Be it known that I, PATRICK FITZGIBBONS,

i the iire-box and joined with the sides ot' the re-box by arched side portions ot the crownsheet, and braced by stay-bolts extended from the said arched portions to the upper part of the interior of the boiler, thereby obtaining greater security against ,the burning` of the crown-sheet and a better distribution of the return-flues over the center of the crown-sheet, all as hereinafter more fully explained, and specifically set forth in the claim.

In the annexed drawings, Figure l is a longitudinal section of my invention; and Fig. 2 is a vertical transverse section ot' the same, taken on line w Similar letters of reference indicate correspondin g parts.

B denotes the boiler proper, the same being t of the ordinary cylindrical form, placed in a horizontal position; Y

A represents the tire-box, formed with a water-space, d, around its sides and bottom, the outer shell of said water-space being joined to the shell of the boiler, which is cut away at its under side from the rear end forward the distance required to receive through it the firebox, which is extended into the bottom of the boiler. The crown-sheet b ot' the fire-box I form with a central segmental depression or downward deliectiomnaturally of a smaller diameter than and concentric with the lower portion of the boilershell. Along the two sides of the fire-box the crown-sheet is formed with reverse curved or arched portions e e, by which it is joined tothe side sheet of the tire-box. The end sheet of the lire-box has its upper edge of a contour corresponding to thecentral deiiection and arched portions of the crown-sheet,

to which said end sheet is joined and riveted iu the usual manner.

It will be observed that by the peculiar contour of the crownsheet b, I increase the heating-surface otl the tire-'box and remove said crown-sheet from the standard water-line ot the boiler, and thus more eftectually guard i against the danger of' its becoming uncovered and unprotected by the water and burned by the iire ofthe tire-box. Furthermore, the central depression of the crown-sheet al'iords more room for the placement 'of the return-lines a a `througdi the center ot the boiler and. a better `upperends of which are securely fastened to the upper portion ot' the interior of the boiler-shell. That portion of the forward end of the lire-box which is inside of theboiler constitutes a segt mentalflue-sheet, c, to which are connected a series of large direct tire-dues, U C, arranged at proper distances apart around the segment formed by the iiuesheet c, said direct liues extending longitudinally through the bottom portion ofthe boiler, and communicating with the usual combustion-chamber, D, at the forward end ot' the boiler.

a a represent the return-dues, extending from the combustion-chamber D through the scribed.

Having described my invention, whatlclaim as new, and desire to secure by Letters Patent, is

The combination,with the boiler B, provided with direct iues (l C and return-fines c @of 95 v the lire-box A, set its entire length into the end of the boiler, and having a crownsheet, b, formed with a longitudinal central depression extended the length of the fireboX,and joined with the side sheets by arched side portions e c IOO a aff/Loi of the erown-sheet,and stay-bolts i i, extended of two attesting Witnesses, 2xt-Syracuse, in the from said arched portions to the upper part of county of Onondaga,in the Stateof New York, the interior ofthe boiler, thewhole constructed this lst day ot' January, 1883.

andy Combined substantially in the manner de- PATRICK FITZGIBBONS. lL. S.] scribed and shown. Witnesses:

ln testimony whereof I have hereunto signed FREDERICK H. GIBBS,

my name and affixed my seal, in the presence WILLIAM C. RAYMOND. 

